Use the Richter scale equation 
, where M is the magnitude of an earthquake, I is the intensity of the shock waves, and 
is the measure of the intensity of a zero-level earthquake. An earthquake occurred that measured 8 on the Richter scale. Find the intensity of the earthquake in terms of . Round to the nearest whole number.
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Mathematics
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The function 
satisfies the equation of change 
. For what values of f is the graph of f versusx increasing?
?
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.If (a, 3) is a point on the graph of y = 2x - 5, what is a?
A. 1 B. -4 C. -1 D. 4
Mathematics
Solve the problem. Round your answer to the nearest tenth, if necessary.Bill can row 3 mph in still water. It takes him 3 hr 36 min to go 3 mi upstream and then return. Find the speed of the current.
A. 3 mph B. 2 mph C. 2.5 mph D. 1.5 mph
Mathematics
Find a quadratic model for the sequence with the indicated terms. ? a0 = -3, a2 = 2, a4 = 10 ?
A. an= 
n2 - 
n - 3
B. an = 3n2 + 
n + 
C. an = 
n2 + 
n + 3
D. an = 
n2 + 
n - 3
E. an= -3n2+ 
n + 
Mathematics